2,5-diacyloxy-2,5-dihydrofuran activators for inorganic per compounds

ABSTRACT

2,5-diacyloxy-2,5-dihydrofurans corresponding to formula (I) ##STR1## wherein R is a C 1  -C 8  alkyl radical or a phenyl radical are useful as activators for inorganic per compounds in oxidizing, cleaning or disinfecting solutions.

BACKGROUND OF THE INVENTION

1. Field of the Invention

This invention relates to the use of 2,5-diacyloxy-2,5-dihydrofurans asactivators for inorganic peroxides and to detergents, cleaningpreparations and disinfectants containing these activators.

2. Discussion of Related Art

Inorganic per compounds, more particularly hydrogen peroxide and solidper compounds which dissolve in water with evolution of hydrogenperoxide, such as sodium perborate and sodium carbonate perhydrate, havelong been used as oxidizing agents for disinfection and bleachingpurposes. The oxidizing effect of these substances in dilute solutionsdepends to a large extent on temperature. Thus, with H₂ O₂ or perborate,for example, sufficiently rapid bleaching of soiled textiles in alkalinebleaching liquors is only achieved at temperatures above approximately80° C. At lower temperatures, the oxidizing effect of the inorganic percompounds can be improved by addition of so-called activators, for whichnumerous proposals have been made in the literature, above all from theclasses of N- or O-acyl compounds, for example polyacylatedalkylenediamines, more particularly tetraacetyl ethylenediamine,acylated glycol urils, more particularly tetraacetyl glycol uril,N-acylated hydantoins, hydrazides, triazoles, urazoles,diketopiperazines, sulfuryl amides and cyanurates, also carboxylicanhydrides, more particularly phthalic anhydride, carboxylic acidesters, more particularly sodium isononanoyl phenyl sulfonate andacylated sugar derivatives, such as pentaacetyl glucose. The bleachingeffect of water-based peroxide liquors can be increased by addition ofthese substances to such an extent that substantially the same effectsare obtained at temperatures as low as 60° C. as are obtained with theperoxide liquor alone at 95° C.

In the efforts being made to develop energy-saving washing and bleachingprocesses, application temperatures well below 60° C. and, moreparticularly, below 45° C. down to the temperature of cold water haveacquired increasing significance in recent years.

Unfortunately, the effect of hitherto known activators clearlydiminishes at these low temperatures. Accordingly, there has been noshortage of attempts to develop more effective activators for thistemperature range although there has not yet been any evidence of realsuccess. The problem addressed by the present invention also was toimprove the oxidizing and bleaching effect of inorganic per compounds atlow temperatures below 80° C. and, more particularly, in the range fromabout 15° C. to 45° C.

DESCRIPTION OF THE INVENTION

Other than in the operating examples, or where otherwise indicated, allnumbers expressing quantities of ingredients or reaction conditions usedherein are to be understood as modified in all instances by the term"about".

It has now been found that a remarkable increase in the oxidizing andbleaching effect of inorganic per compounds in oxidation, bleaching andwash liquors is achieved in this temperature range by the use of certain2,5-diacyl-oxy-2,5-dihydrofurans as activators. The activators inquestion are substances selected from compounds corresponding to formula(I) ##STR2## in which R is a C₁₋₈ alkyl radical or the phenyl radical,and mixtures thereof. Compounds corresponding to formula (I), in whichR=C₁₋₄ alkyl, and mixtures thereof are particularly preferred. Thepresent invention also relates to detergents, cleaning preparations anddisinfectants containing such activators and to a process for activatinginorganic per compounds.

The 2,5-diacyloxy-2,5-dihydrofurans corresponding to formula (I) to beused in accordance with the invention may be produced by chemical orelectrochemical oxidation of furan by processes known in principle, forexample as described in DE-OS 26 01 543, in GB-PSS 642,277 and 703,297,by N. Elming and N. Clauson-Kaas in Acta Chem. Scand. 6 (1952), 535 orby A.J. Baggaley and R. Brettle in J. Chem. Soc. (C) 1968, 969.

In the process according to the invention, the compounds in question maybe used as activators in any applications where it is important toobtain a particular increase in the oxidation effect of inorganic percompounds at low temperatures, for example in the bleaching of textiles,hair or hard surfaces, in the oxidation of organic or inorganicintermediate products and in disinfection.

The use according to the invention comprises establishing conditionsunder which hydrogen peroxide and 2,5-diacyloxy-2,5-dihydro can reactwith one another with the object of obtaining products which have astronger oxidizing effect. Such conditions prevail in particular whenboth reactants are contacted with one another in aqueous solution. Thiscan be done by separate addition of the per compound and the activatorto a solution optionally containing detergents or cleaning preparations.However, the process according to the invention is carried out withparticular advantage using a detergent, cleaning preparation ordisinfectant according to the invention containing the activator and,optionally, a peroxidic oxidizing agent. The per compound may also beadded to the solution separately, in bulk or in the form of a preferablyaqueous solution or suspension where a peroxide-free preparation isused.

The conditions may be varied within wide limits according to theapplication envisaged. Thus, in addition to purely aqueous solutions,mixtures of water and suitable organic solvents may also be used as thereaction medium. The quantities of per compounds used are generallyselected so that the solution contains between 10 ppm and 10% activeoxygen and preferably between 50 and 5000 ppm active oxygen. Thequantity of activator used also depends on the application envisaged.The activator is used in a quantity of 0.03 to 1 mol and preferably in aquantity of 0.1 to 0.5 mol per mol inorganic per compound, depending onthe desired degree of activation. In special cases, however, it may alsobe used in larger or smaller quantities.

A detergent, cleaning preparation or disinfectant according to theinvention preferably contains 0.2% by weight to 30% by weight and, moreparticularly, 1% by weight to 20% by weight of the activator accordingto the invention. The activator used may be adsorbed to supports and/orencapsulated in shell-forming substances, as known in principle.

The detergents, cleaning preparations and disinfectants according to theinvention, which may be present in the form of powder-form solids,homogeneous solutions or suspensions, may in principle contain any knowningredients typical of such preparations in addition to the activatoraccording to the invention in the form of a compound corresponding toformula (I) or mixtures of such compounds. More particularly, thedetergents and cleaning preparations according to the invention maycontain builders, surfactants, inorganic per compounds, water-miscibleorganic solvents, enzymes, sequestrants, electrolytes, pH regulators andother auxiliaries, such as optical brighteners, redeposition inhibitors,foam regulators, additional peroxide activators, dyes and fragrances.

In addition, a cleaning preparation according to the invention for hardsurfaces may contain abrasive constituents, more particularly from thegroup consisting of silica flours, sawdusts, powdered plastics, chalksand glass microbeads or mixtures thereof. The cleaning preparationsaccording to the invention preferably contain no more than 20% by weightand, more particularly, between 1% by weight and 10% by weightabrasives.

To enhance its disinfecting effect on special germs, a disinfectantaccording to the invention may contain typical antimicrobial agents inaddition to the ingredients mentioned above. The disinfectants accordingto the invention preferably contain no more than 10% by weight and, moreparticularly, between 0.1 and 5% by weight of such antimicrobialadditives.

The preparations according to the invention contain one or moresurfactants, more particularly anionic surfactants, nonionic surfactantsand mixtures thereof. Suitable nonionic surfactants are, in particular,alkyl glycosides and ethoxylation and/or propoxylation products of alkylglycosides or linear or branched alcohols containing 12 to 18 carbonatoms in the alkyl component and 3 to 20 and preferably 4 to 10 alkylether groups. It is also possible to use corresponding ethoxylationand/or propoxylation products of N-alkylamines, vicinal diols and fattyacid amides, which correspond to the long-chain alcohol derivativesmentioned in regard to the alkyl component, and alkylphenols containing5 to 12 carbon atoms in the alkyl radical.

Suitable anionic surfactants are, in particular, soaps and thosecontaining sulfate or sulfonate groups with, preferably, alkali metalions as cations. Preferred soaps are the alkali metal salts of saturatedor unsaturated C₁₂₋₁₈ fatty acids. Fatty acids such as these may also beused in incompletely neutralized form. Suitable surfactants of thesulfate type include the salts of sulfuric acid semiesters of C₁₂₋₁₈fatty alcohols and the sulfation products of the nonionic surfactantsmentioned with low degrees of ethoxylation. Suitable surfactants of thesulfonate type include linear alkylbenzene sulfonates containing 9 to 14carbon atoms in the alkyl component, alkane sulfonates containing 12 to18 carbon atoms and olefin sulfonates containing 12 to 18 carbon atoms,which are formed in the reaction of corresponding monoolefins withsulfur trioxide, and also α-sulfofatty acid esters which are formed inthe sulfonation of fatty acid methyl or ethyl esters.

These surfactants are present in the cleaning preparations or detergentsaccording to the invention in quantities of, preferably, 5% by weight to50% by weight and, more preferably, 8% by weight to 30% by weight whilethe disinfectants according to the invention preferably contain 0.1% byweight to 20% by weight and, more preferably, 0.2% by weight to 5% byweight surfactants.

Suitable per compounds are, in particular, hydrogen peroxide andinorganic salts which release hydrogen peroxide under the cleaningconditions, such as perborate, percarbonate and/or persilicate. If solidper compounds are to be used, they may be used in the form of powders orgranules which may also be encapsulated in known manner. The percompounds may be added to the cleaning liquor as such or in the form ofpreparations containing the per compounds and, in principle, any typicalconstituents of detergents, cleaning preparations or disinfectants.Hydrogen peroxide is preferably used in the form of aqueous solutionscontaining 3 to 10% by weight hydrogen peroxide. If a detergent orcleaning preparation according to the invention contains per compounds,they are present in quantities of preferably not more than 50% by weightand, more preferably, between 5 and 30% by weight while disinfectantsaccording to the invention preferably contain per compounds inquantities of 0.5% by weight to 40% by weight and, more preferably, inquantities of 5% by weight to 20% by weight.

Suitable builders, which may be used individually or in admixture, arethose from the classes of polycarboxylic acids, more particularlypolymers of acrylic acid, methacrylic acid and maleic acid andcopolymers thereof, aminopolycarboxylic acids, more particularlynitrilotriacetic acid and ethylenediamine tetraacetic acid,polyphosphonic acids, more particularly aminotri-(methylenephosphonicacid), ethylenediamine tetra(methylenephosphonic acid) and1-hydroxyethane-1,1-diphosphonic acid, polyphosphates, more particularlysodium triphosphate, layer silicates, more particularly bentonites, andaluminosilicates, more particularly zeolites, preferably zeolites of theNaA or NaX type. The acids mentioned above are typically used in theform of their alkali metal salts, more particularly their sodium orpotassium salts. The builders are present in the detergents or cleaningpreparations according to the invention in quantities of preferably notmore than 60% by weight and, more preferably, in quantities of 5% byweight to 40% by weight while the disinfectants according to theinvention are preferably free from builders which merely complex thecomponents responsible for water hardness and preferably contain notmore than 20% by weight and, more particularly, between 0.1% by weightand 5% by weight heavy metal complexing agents, preferably from thegroup consisting of aminopolycarboxylic acids, aminopolyphosphonic acidsand hydroxypolyphosphonic acids and their water-soluble salts and alsomixtures thereof.

Suitable enzymes are those from the class of proteases, lipases andamylases and also mixtures thereof. Enzymatic agents obtained from fungior bacterial strains, such as Bacillus subtilis, Bacillus licheniformisand Streptomyces griseus, are particularly suitable. The enzymes usedmay be adsorbed to supports and/or encapsulated in shell-formingsubstances to protect them against premature inactivation. They arepreferably present in the detergents, cleaning preparations anddisinfectants according to the invention in quantities of not more than1% by weight and, more preferably, in quantities of 0.2% by weight to0.7% by weight.

Organic solvents which may be used in the preparations according to theinvention, particularly where they are present in liquid form, includeC₁₋₄ alcohols, more particularly methanol, ethanol, isopropanol andtert. butanol, C₂₋₄ diols, more particularly ethylene glycol andpropylene glycol, and mixtures thereof. Water-miscible solvents such asthese are present in the detergents, cleaning preparations anddisinfectants according to the invention in quantities of preferably notmore than 30% by weight and, more preferably, in quantities of 6% byweight to 20% by weight.

To establish a desired pH value, which is not spontaneously adjusted bythe mixture of the remaining components, the preparations according tothe invention may contain system-compatible and ecologically safe acids,more particularly citric acid, acetic acid, tartaric acid, malic acid,lactic acid, glycolic acid, succinic acid, glutaric acid and/or adipicacid, and also mineral acids, more particularly sulfuric acid, or bases,more particularly ammonium or alkali metal hydroxides. These pHregulators are present in the preparations according to the invention inquantities of preferably not more than 20% by weight and, morepreferably, in quantities of 1.2% by weight to 17% by weight.

The production of the solid preparations according to the invention doesnot involve any difficulties and may be carried out by methods known inprinciple, for example by spray drying or granulation, the per compoundand activator optionally being separately added at a later stage.Detergents, cleaning preparations or disinfectants in the form ofaqueous solutions or solutions containing other typical solvents areproduced with particular advantage by simple mixing of the ingredientswhich may be introduced into an automatic mixer either in bulk or insolution.

EXAMPLES Example 1: Preparation of the activators

1. 2,5-diacetoxy-2,5-dihydrofuran

97.5 g lead (IV) acetate were added in portions with stirring at 50° C.to a mixture of 180 ml glacial acetic acid and 115 ml acetanhydride.After addition of 14.9 g furan, the reaction mixture was heated for 1.5hours to 60 to 65° C. The solvent was then largely removed in vacuo(approx. 10 torr, bath temperature 60° C.). 400 ml anhydrous diethylether were added to the residue which was then subjected to fractionaldistillation after filtration and removal of the solvent. 24.5 g2,5-diacetoxy-2,5-dihydrofuran were obtained in the boiling range from81° C. to 85° C./0.01 torr in the form of a gas chromatographically 99%pure liquid having a refractive index n_(D) ²⁵ of 1.4538.

2. 2,5-dipropionyloxy-2,5-dihydrofuran

A mixture of 130 ml propionic acid, 51.3 g lead (IV) propionate(prepared by the method described by D.H. Hey, C.J.M. Stirling and G.H.Williams in J. Chem. Soc. 1954, 2747) and 7.0 g furan was heated for 35minutes to 55°-60° C. and for 45 minutes to 60°-65° C. Subsequentfractional distillation gave 12.0 g 2,5-dipropionyloxy-2,5-dihydrofuranin the boiling range from 110° C. to 116° C. /0.5 torr in the form of agas chromatographically 98% pure liquid having a refractive index n_(D)²⁵ of 1.4525.

3. 2,5-dibutyroxy-2,5-dihydrofuran

Following the procedure described in 2, 2,5-dibutyroxy-2,5-dihydrofuranis obtained from 36.5 g lead (IV) butyrate, 135 ml butyric acid and 4.5g furan in the boiling range from 104° C. to 108° C./0.2 torr in theform of a gas chromatographically 98% pure liquid having a refractiveindex n_(D) ²⁵ of 1.4496.

4. 2,5-dibenzoyloxy-2,5-dihydrofuran

A mixture of 100 g benzoic acid, 67.5 g lead (IV) benzoate (produced bythe method described in J. Chem. Soc. 1954, 2747) and 10.2 g furan washeated for 1 hour to 50° C. and for 3 hours to 75° C. After cooling toroom temperature, filtration and removal of excess furan in vacuo, 26 g2,5-dibenzoyloxy-2,5-dihydrofuran melting at 190 to 196° C. crystallizedout from the residue after addition of 100 ml dioxane and cooling toapprox. 0° C.

5. 2,5-dipentanoyloxy-2,5-dihydrofuran

Following the procedure described in 4, 17.3 g2,5-dipentanoyloxy-2,5-dihydrofuran melting at 30 to 35° C. wereobtained from 68.2 g lead (IV) valerate, 100 ml valeric acid and 7.6 gfuran.

Example 2

Liquid detergents D1 and D2 and liquid detergents D3 and D4 additionallycontaining 2,5-diacetoxy-2,5-dihydrofuran were produced simply by mixingtheir constituents in the quantities shown in Table 1. Instead of thebleach activator 2,5-diacetoxy-2,5-dihydrofuran,2,5-dibutyroxy-2,5-dihydrofuran (D5), 2,5-dipentanoyloxy-2,5(D6) or2,5-dibenzoyloxy-2,5-dihydrofuran (D7) was incorporated in formulationswhich otherwise corresponded to detergent D4.

                  TABLE 1                                                         ______________________________________                                        Detergent composition [% by weight]                                                          D1   D2       D3     D4                                        ______________________________________                                        Na--C.sub.10-13 alkyl-                                                                         12     12       12   12                                      benzene sulfonate                                                             Ethoxylated C.sub.13-15                                                                        15     15       15   15                                      fatty alcohol (7 EO)                                                          C.sub.16-18 fatty acid                                                                         5      5        5    5                                       C.sub.12-14 fatty acid                                                                         10     10       10   10                                      Diethylene triamine                                                                            1      1        1    1                                       pentamethylene                                                                phosphonic acid sodium                                                        salt                                                                          Monoethanolamine 5      0        5    0                                       Ethanol          7      7        7    7                                       Sodium hydroxide 3      3        3    3                                       Citric acid        0.5    0.5      0.5                                                                                0.5                                   Enzyme (protease)                                                                                0.5    0.5      0.5                                                                              0                                       Optical brightener                                                                               0.2    0.2      0.2                                                                                0.2                                   (Blankophor ® MBBH)                                                       2,5-diacetoxy-   0      0        2    2                                       2,5-dihydrofuran                                                              Water            ad 100                                                       ______________________________________                                    

Aqueous solutions containing quantities of 0.9 g of the detergentsmentioned and 2 ml red wine per 100 ml were examined by UV/Visspectroscopy (measuring wavelength 460 nm). The reductions in the dyeconcentration (δc) shown in Table 2 were observed after a reaction timeof 30 minutes at 30° C. In a launderometer of the Atlas Standard Type(250 ml liquor volume, water hardness 17° Gh), quantities of 2.1 gfabrics soiled with the test soils indicated in Table 3 were washed for30 minutes (including heating time (3° C./minute)) with quantities of6.3 g clean ballast fabrics of white cotton at 40° C or 60° C. withdetergent D2 (9.25 grams per liter washing solution) and then rinsedthree times for 30 seconds (column I). After drying, the remission ofthe apparently clean test fabrics, based on BaSO₄₋ 100%, wasphotometrically determined (measuring wavelength 460 nm). Forcomparison, the same washing solution, to which 2% by weight hydrogenperoxide --expressed as 100% substance - had been added (column II) anda washing solution containing 9.25 g per liter of detergent D4 and 2% byweight hydrogen peroxide (column III) were tested under the sameconditions.

                  TABLE 2                                                         ______________________________________                                        Reduction in dye concentration                                                Detergent           δc[%]                                               ______________________________________                                        D1                  0                                                         D1 + 2% by weight H.sub.2 O.sub.2                                                                 9                                                         D3 + 2% by weight H.sub.2 O.sub.2                                                                 52                                                        ______________________________________                                    

                  TABLE 3                                                         ______________________________________                                        Remission values [ %]                                                         I               II          III                                                       [40°                                                                          [60°                                                                            [40°                                                                        [60°                                                                          [40°                                                                        [60°                          Soil    C.]    C.]      C.]  C.]    C.]  C.]                                  ______________________________________                                        A       56.1   60.2     56.4 60.3   60.2 63.3                                 B       60.5   65.2     61.5 67.8   64.9 70.0                                 C       61.8   64.7     62.6 65.7   64.1 67.3                                 D       46.5   47.0     48.0 50.4   51.5 54.0                                 E       55.0   49.0     55.2 51.7   57.2 59.8                                 F       52.8   54.1     53.7 57.0   56.6 58.3                                 G       57.3   56.9     59.1 59.8   62.8 64.5                                 ______________________________________                                         Soils: A = red wine on cotton; B = tea on cotton; C = coffee on cotton; D     = red wine on creaseresistant cotton; E = tea on creaseresistant cotton;      = red wine on cotton/polyester blend; G = tea on cotton/polyester blend. 

The remission values tabulated in Table 3 demonstrate the superiorbleaching effect of the formulation containing the activator accordingto the invention by comparison with the activator-free and peroxide-freedetergent (column I) and with the activator-free, butperoxide-containing detergent (column II).

Example 3: Testing of stability in storage

After storage for 14 days at room temperature, the content of bleachactivator in the liquid detergents according to the invention listed inthe following Table was determined by the test based on the decoloringof Brilliant Green. To this end, 100 μl of a 0.1% by weight solution(water/ethanol 1:1) of Brilliant Green (Aldrich) were added similarly tothe method described in Example 2 to quantities of 100 ml of an aqueoussolution containing 0.9 g of a detergent according to Table 4 and 2 % byweight H₂ O₂. The content of bleach activator in the particulardetergent was determined by UV/Vis-spectroscopic measurement of thereduction in the dye concentration.

                  TABLE 4                                                         ______________________________________                                                    Content of bleach                                                 Detergent   activator [% by weight]                                           ______________________________________                                        D4          1.96                                                              D5          1.96                                                              D6          1.98                                                              D7          1.99                                                              ______________________________________                                    

We claim:
 1. The process of activating an inorganic per compound in anoxidizing, cleaning or disinfecting solution, comprising adding to saidsolution a 2,5-diacyloxy-2,5-dihydrofuran activator compoundcorresponding to formula (I) ##STR3## wherein R is a C₁ =14 C₈ alkylradical or a phenyl radical, said activator compound being added in anamount effective to activate said inorganic per compound, and whereinsaid inorganic per compound is added to said solution prior to,simultaneously, or subsequent to addition of said activator compound. 2.A process as in claim 1 wherein said solution comprises an aqueoussurfactant-containing solution.
 3. A process as in claim 1 wherein saidper compound comprises a peroxide-containing bleaching agent.
 4. Aprocess as in claim 1 wherein in said compound corresponding to formula(I), R is a C₁ -C₄ alkyl radical.
 5. A process as in claim 1 whereinsaid per compound is selected from the group consisting of hydrogenperoxide, perborate, percarbonate, and mixtures thereof.
 6. Asurfactant-containing composition useful for oxidizing, cleaning ordisinfecting an article, said composition containing a 2,5-diacyloxy2,5-dihydrofuran activator compound corresponding to formula (I)##STR4## wherein R is a C₁ =14 C₈ alkyl radical or a phenyl radical,said activator compound being present in an amount effective to activatean inorganic per compound.
 7. A composition as in claim 6 wherein insaid compound corresponding to formula (I), R is a C₁ -C₄ alkyl radical.8. A composition as in claim 6 further containing from an oxidizingeffective amount up to about 50% by weight of a per compound selectedfrom the group consisting of hydrogen peroxide, perborate, percarbonateand mixtures thereof, based on the weight of said compound.
 9. Acomposition as in claim 6 containing from about 0.2 to about 30% byweight of said activator compound, from about 0.5 to about 40% by weightof a per compound selected from the group consisting of hydrogenperoxide, perborate, percarbonate and mixtures thereof, from about 0.1to about 20% by weight of an anionic or nonionic surfactant, from 0 toabout 20% by weight of a water hardness complexing agent, from 0 toabout 1% by weight of an enzyme, from 0 to about 30% by weight of anorganic solvent, from 0 to about 20% by weight of a pH regulator, andfrom 0 to about 10% by weight of an additional antimicrobial agent. 10.A composition as in claim 6 containing from about 0.2 to about 30% byweight of said activator compound, from about 5 to about 50% by weightof an anionic or nonionic surfactant, from 0 to about 60% by weight of abuilder component, from 0 to about 1% by weight of an enzyme, from 0 toabout 30% of an organic solvent, and from 0 to about 20% by weight of apH regulator, all weights being based on the weight of said composition.11. A composition as in claim 10 containing from about 5 to about 40% byweight of a builder component selected from the group consisting ofpolycarboxylic acid, aminopolycaroxylic acid, polyphosphonic acid,polyphosphate, layer silicate and aluminosilicate; from about 0.2 toabout 0.7% by weight of an enzyme; from about 6 to about 20% by weightof an organic solvent selected from the group consisting of a C₁ -C₄alcohol, C₂ -C₄ diol and mixtures thereof; and from about 1.2 to about17% by weight of a pH regulator, all weights being based on the weightof said composition.
 12. A composition as in claim 10 further containingup to about 20% by weight of an abrasive selected from the groupconsisting of silica flour, sawdust, powdered plastic, chalk, glassmicrobeads, and mixtures thereof, based on the weight of saidcomposition.
 13. A composition as in claim 11 further containing up toabout 20% by weight of an abrasive selected from the group consisting ofsilica flour, sawdust, powdered plastic, chalk, glass microbeads andmixtures thereof, based on the weight of said composition.
 14. Acomposition as in claim 18 further containing from an oxidizingeffective amount up to about 50% by weight of a per compounds selectedfrom the group consisting of hydrogen peroxide, perborate, percarbonateand mixtures thereof, based on the weight of said composition.